Xiang Jing, Chuang Sylvester, Wilson Daniel, Otsubo Hiroshi, Pang Elizabeth, Holowka Stephanie, Sharma Rohit, Ochi Ayako, Chitoku Shiro
Department of Diagnostic Imaging, The Hospital for Sick Children, 555 University Avenue, Toronto, Ont., Canada M5G 1X8.
Clin Neurophysiol. 2002 Jan;113(1):1-9. doi: 10.1016/s1388-2457(01)00709-x.
The aim of present study was to determine which brain regions are involved in the conscious perception of sound motion in humans.
Six kinds of sound stimuli were studied. Two static sound stimuli with durations of 100 or 1000 ms remained at a fixed position during the stimulation period. Four moving sound stimuli with duration of 100 or 1000 ms were moving from left to right, or right to left, during the stimulation period. Evoked magnetic fields were recorded using a 151-channel whole cortex magnetoencephalographic system.
The response identified in all sound stimuli was M100. Responses identified only in moving sound stimuli were M180, M280 and M680. Contour maps and dipoles overlapped on magnetic resonance imaging indicated that both the M100 and M680 responses were generated in the superior temporal cortex (left and right), while M180 and M280 were generated in the parietal cortex (right).
The results of this MEG study indicated that the right parietal cortex was involved in sound motion processing. We hypothesize that the right parietal cortex, in association with the left and right superior temporal cortex, forms a network to process sound motion information.
本研究旨在确定人类大脑中哪些区域参与声音运动的意识感知。
研究了六种声音刺激。两种持续时间为100或1000毫秒的静态声音刺激在刺激期间保持在固定位置。四种持续时间为100或1000毫秒的移动声音刺激在刺激期间从左向右或从右向左移动。使用151通道全脑皮层脑磁图系统记录诱发磁场。
在所有声音刺激中识别出的反应是M100。仅在移动声音刺激中识别出的反应是M180、M280和M680。磁共振成像上的等高线图和偶极子重叠表明，M100和M680反应均在颞上叶皮质（左右）产生，而M180和M280在顶叶皮质（右侧）产生。
这项脑磁图研究的结果表明，右侧顶叶皮质参与声音运动处理。我们假设右侧顶叶皮质与左右颞上叶皮质联合形成一个网络来处理声音运动信息。
